vale-ctl.c revision 251139 
1/*
2 * Copyright (C) 2013 Michio Honda. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *   1. Redistributions of source code must retain the above copyright
8 *      notice, this list of conditions and the following disclaimer.
9 *   2. Redistributions in binary form must reproduce the above copyright
10 *      notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26/* $FreeBSD: head/tools/tools/netmap/vale-ctl.c 251139 2013-05-30 14:07:14Z luigi $ */
27
28#include <errno.h>
29#include <stdio.h>
30#include <inttypes.h>	/* PRI* macros */
31#include <string.h>	/* strcmp */
32#include <fcntl.h>	/* open */
33#include <unistd.h>	/* close */
34#include <sys/ioctl.h>	/* ioctl */
35#include <sys/param.h>
36#include <net/if.h>	/* ifreq */
37#include <net/netmap.h>
38#include <net/netmap_user.h>
39#include <libgen.h>	/* basename */
40
41/* debug support */
42#define ND(format, ...)	do {} while(0)
43#define D(format, ...)					\
44	fprintf(stderr, "%s [%d] " format "\n",		\
45	__FUNCTION__, __LINE__, ##__VA_ARGS__)
46
47static int
48bdg_ctl(const char *name, int nr_cmd, int nr_arg)
49{
50	struct nmreq nmr;
51	int error = 0;
52	int fd = open("/dev/netmap", O_RDWR);
53
54	if (fd == -1) {
55		D("Unable to open /dev/netmap");
56		return -1;
57	}
58
59	bzero(&nmr, sizeof(nmr));
60	nmr.nr_version = NETMAP_API;
61	if (name != NULL) /* might be NULL */
62		strncpy(nmr.nr_name, name, sizeof(nmr.nr_name));
63	nmr.nr_cmd = nr_cmd;
64
65	switch (nr_cmd) {
66	case NETMAP_BDG_ATTACH:
67	case NETMAP_BDG_DETACH:
68		if (nr_arg && nr_arg != NETMAP_BDG_HOST)
69			nr_arg = 0;
70		nmr.nr_arg1 = nr_arg;
71		error = ioctl(fd, NIOCREGIF, &nmr);
72		if (error == -1)
73			D("Unable to %s %s to the bridge", nr_cmd ==
74			    NETMAP_BDG_DETACH?"detach":"attach", name);
75		else
76			D("Success to %s %s to the bridge\n", nr_cmd ==
77			    NETMAP_BDG_DETACH?"detach":"attach", name);
78		break;
79
80	case NETMAP_BDG_LIST:
81		if (strlen(nmr.nr_name)) { /* name to bridge/port info */
82			error = ioctl(fd, NIOCGINFO, &nmr);
83			if (error)
84				D("Unable to obtain info for %s", name);
85			else
86				D("%s at bridge:%d port:%d", name, nmr.nr_arg1,
87				    nmr.nr_arg2);
88			break;
89		}
90
91		/* scan all the bridges and ports */
92		nmr.nr_arg1 = nmr.nr_arg2 = 0;
93		for (; !ioctl(fd, NIOCGINFO, &nmr); nmr.nr_arg2++) {
94			D("bridge:%d port:%d %s", nmr.nr_arg1, nmr.nr_arg2,
95			    nmr.nr_name);
96			nmr.nr_name[0] = '\0';
97		}
98
99		break;
100
101	default: /* GINFO */
102		nmr.nr_cmd = nmr.nr_arg1 = nmr.nr_arg2 = 0;
103		error = ioctl(fd, NIOCGINFO, &nmr);
104		if (error)
105			D("Unable to get if info for %s", name);
106		else
107			D("%s: %d queues.", name, nmr.nr_rx_rings);
108		break;
109	}
110	close(fd);
111	return error;
112}
113
114int
115main(int argc, char *argv[])
116{
117	int ch, nr_cmd = 0, nr_arg = 0;
118	const char *command = basename(argv[0]);
119	char *name = NULL;
120
121	if (argc != 3 && argc != 1 /* list all */ ) {
122usage:
123		fprintf(stderr,
124			"Usage:\n"
125			"%s arguments\n"
126			"\t-g interface	interface name to get info\n"
127			"\t-d interface	interface name to be detached\n"
128			"\t-a interface	interface name to be attached\n"
129			"\t-h interface	interface name to be attached with the host stack\n"
130			"\t-l list all or specified bridge's interfaces\n"
131			"", command);
132		return 0;
133	}
134
135	while ((ch = getopt(argc, argv, "d:a:h:g:l:")) != -1) {
136		switch (ch) {
137		default:
138			fprintf(stderr, "bad option %c %s", ch, optarg);
139			goto usage;
140		case 'd':
141			nr_cmd = NETMAP_BDG_DETACH;
142			break;
143		case 'a':
144			nr_cmd = NETMAP_BDG_ATTACH;
145			break;
146		case 'h':
147			nr_cmd = NETMAP_BDG_ATTACH;
148			nr_arg = NETMAP_BDG_HOST;
149			break;
150		case 'g':
151			nr_cmd = 0;
152			break;
153		case 'l':
154			nr_cmd = NETMAP_BDG_LIST;
155			break;
156		}
157		name = optarg;
158	}
159	if (argc == 1)
160		nr_cmd = NETMAP_BDG_LIST;
161	bdg_ctl(name, nr_cmd, nr_arg);
162	return 0;
163}
164